Then we discuss the whole gateway software from three processes: PLC communication process, network communication process and user configuration file download process.
并将整个网关程序分三个进程讨论，以分别负责PLC通信、网络接口通信与用户配置文件下载。
This paper introduces the application of PLC in the high-speed wire rolling automation system and discusses the general structure, PLC types and communication network.
介绍了PLC在高速线材热轧自动化系统中的应用情况，从系统总体结构、PLC机型简介及其通信网络等方面进行了阐述。
The communication principle, problem and counter plot of other level network of PLC which adopt themselves patent agreement are analyzed.
分析了PLC网络其它各层采用专利协议的通信原理，存在问题及对策。
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